386  
AXNT20 KNHC 051005  
TWDAT  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
505 AM EST SUN NOV 5 2017  
 
TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA, CENTRAL AMERICA  
GULF OF MEXICO, CARIBBEAN SEA, NORTHERN SECTIONS OF SOUTH  
AMERICA, AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE  
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE  
IMAGERY, WEATHER OBSERVATIONS, RADAR AND METEOROLOGICAL ANALYSIS.  
 
BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH  
0915 UTC.  
   
..ITCZ/MONSOON TROUGH
 
 
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 12N17W TO  
09N20W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM  
09N20W TO 06N30W TO 05N53W. SCATTERED MODERATE CONVECTION IS FROM  
01N-09N BETWEEN 10W-44W. WIDELY SCATTERED MODERATE CONVECTION IS  
FROM 10N-18N BETWEEN 41W-51W.  
   
..DISCUSSION
 
 
GULF OF MEXICO...  
A SURFACE RIDGE ANCHORED BY A 1020 MB HIGH CENTERED NEAR 30N87W  
CONTINUES TO PREVAIL ACROSS THE ENTIRE BASIN THIS MORNING. LATEST  
SCATTEROMETER DATA INDICATES GENTLE TO MODERATE ANTICYCLONIC FLOW  
THROUGHOUT. THE RIDGE IS EXPECTED TO MOVE LITTLE AND REMAIN  
NEARLY STATIONARY ACROSS THE NE GULF WATERS THROUGH WEDNESDAY.  
MODERATE TO OCCASIONAL FRESH SOUTHERLY RETURN FLOW IS FORECAST  
ACROSS WESTERN PORTIONS THROUGH WEDNESDAY WHEN THE NEXT FRONT IS  
EXPECTED TO EMERGE OFF THE TEXAS AND LOUISIANA COAST WEDNESDAY  
LATE AFTERNOON INTO THE EARLY EVENING.  
 
CARIBBEAN SEA...  
A SURFACE TROUGH EXTENDS FROM 13N82W INTO A 1010 MB LOW NEAR  
16N82W TO 20N81W AND CONTINUES TO PROVIDE FOCUS FOR WIDELY  
SCATTERED SHOWERS AND TSTMS OCCURRING FROM 11N-20N BETWEEN 77W-  
85W. THE MONSOON TROUGH AXIS ALSO EXTENDS FROM NORTHERN COLOMBIA  
ALONG 10N TO COSTA RICA WITH WIDELY SCATTERED SHOWERS AND  
ISOLATED TSTMS OCCURRING S OF 11N BETWEEN 74W-84W. FARTHER  
EAST...SHALLOW ISOLATED SHOWERS ARE OCCURRING PRIMARILY E OF  
70W...INCLUDING THE MONA PASSAGE...PUERTO RICO...AND ACROSS MANY  
OF THE LESSER ANTILLES. OTHERWISE...GENTLE TO MODERATE TRADES ARE  
EXPECTED TO PERSIST THROUGH WEDNESDAY.  
   
..HISPANIOLA
 
 
ISOLATED SHOWERS LINGER ACROSS THE ISLAND THIS MORNING...HOWEVER  
OVERALL THE PATTERN IS EXPECTED TO REMAIN FAIRLY TRANQUIL THE NEXT  
FEW DAYS WITH WEST-SOUTHWESTERLY FLOW ALOFT AND GENTLE TO  
MODERATE TRADES AT THE SURFACE.  
 
ATLANTIC OCEAN...  
WATER VAPOR IMAGERY INDICATES A MIDDLE TO UPPER LEVEL SHORTWAVE  
TROUGH WITH AXIS EXTENDING FROM 31N74W TO 23N80W TO A BASE OVER  
CENTRAL AMERICA NEAR 15N90W. THIS TROUGHING SUPPORTS A 1012 MB  
LOW CENTERED E OF THE BAHAMAS NEAR 26N75W AND A SURFACE TROUGH  
EXTENDING N-NW TO 32N79W. LOW-LEVEL MOISTURE CONVERGENCE IN THE  
VICINITY OF THE TROUGH AXIS AND MIDDLE TO UPPER LEVEL DIVERGENCE  
IS GENERATING SCATTERED SHOWERS AND ISOLATED TSTMS MOSTLY E OF  
THE TROUGH AXIS FROM 25N-32N BETWEEN 69W-77W. ACROSS THE CENTRAL  
ATLC...A MIDDLE TO UPPER LEVEL SHORTWAVE IS NOTED ON WATER VAPOR  
IMAGERY IN THE VICINITY OF 27N51W. THIS SHORTWAVE SUPPORTS A 1014  
MB LOW CENTERED NEAR 28N52W WITH SCATTERED SHOWERS AND ISOLATED  
TSTMS OCCURRING FROM 22N-34N BETWEEN 44W-53W. THE REMAINDER OF  
THE EASTERN ATLC IS UNDER THE INFLUENCE OF A SURFACE RIDGE  
ANCHORED BY A 1033 MB HIGH CENTERED NE OF THE AZORES NEAR 43N21W.  
 
FOR ADDITIONAL INFORMATION PLEASE VISIT  
HTTP://WWW.HURRICANES.GOV/MARINE  
 

 
HUFFMAN  
 
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